cpufeature: correctly annotate the module init function

2015-07-22T07:58:02Z

A section mismatch warning is reported if an __init annotated function is specified for module_cpu_feature_match(). Change the module_cpu_feature_match() function and annotate the generated cpu_feature_match_* function as __init. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

cpu: add generic support for CPU feature based module autoloading

2014-02-18T20:38:37Z

This patch adds support for advertising optional CPU features over udev using the modalias, and for declaring compatibility with/dependency upon such a feature in a module. The mapping between feature numbers and actual features should be provided by the architecture in a file called which exports the following functions/macros: - cpu_feature(FEAT), a preprocessor macro that maps token FEAT to a numeric index; - bool cpu_have_feature(n), returning whether this CPU has support for feature #n; - MAX_CPU_FEATURES, an upper bound for 'n' in the previous function. The feature can then be enabled by setting CONFIG_GENERIC_CPU_AUTOPROBE for the architecture. For instance, a module that registers its module init function using module_cpu_feature_match(FEAT_X, module_init_function) will be probed automatically when the CPU's support for the 'FEAT_X' feature is advertised over udev, and will only allow the module to be loaded by hand if the 'FEAT_X' feature is supported. Signed-off-by: Ard Biesheuvel Signed-off-by: Greg Kroah-Hartman

kernel/include/linux/cpufeature.h, branch linux-4.15.y

cpufeature: correctly annotate the module init function

cpu: add generic support for CPU feature based module autoloading